#include "my_function.h"

int main()
{
    printf("Hello world!\n");

    // [test 01] change number
    int input = 0;
    int sum = 0;
    // input
    scanf("%d", &input);
    int i = 0;
    while (input){
        int bit = input % 10;
        bit %= 2;
        sum += bit * pow(10, i);
    }

    return 0;
}
